Crushing being avoided is a glass bottle exercise, in practice crushing does hit everyone - however Warriors and Paladins CAN close the gap at some point, which still means they'll be crushed less.
Basically the goal of the spreadsheet is to see how that works, of course the fact that it's not editable to the public means no one can see the math I'm using...
For an editable version take a look:
http://www.botbh.com/files/Mitigation vs 70.xlsx
Thanks,